Liquid-gage.



F. I. & B. P.'REMY & A. BERGER.

LIQUID GAGE. APPLICATION FILED NOV. I3 19M- Patented July 4, 1916.

I v WITNESSES I I ywm UNITED STATES PATENT OFFICE.

FRANK I. REMY, BENJAMIN P. REMY, AND ARTHUR B RGER, 0E ANDERsoN, INDIANA, AssIGNoRs TO REMY BROTHERS COMPANY, OF ANDERSON, INDIANA, A COPART- NERSHIP.

LIQUID-GAGE.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed November 13, 1914. Serial No. 871,951.

To all whom it may concern:

Be it known that we, FRANK I. REMY, BENJAMIN P. REMY, and ARTHUR BERGER, citizens of the United States, and residents of Anderson, county of Madison, and State of Indiana, have invented a certain new and useful Liquid-Gage; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

The object of this invention is to improve the means for indicating the quantity of liquid in a tank so that the gage will be dependable.

The invention has been made for the particular purpose of indicating the amount of gasolene in the tank on a motor vehicle, butit is not necessarily .limited to said use.

The chief feature of the invention consists in a gage adapted to be electrically operated and controlled by the quantity of liquid in the tank, acting through a float or other means for varying the current going to the gage in accordance with or in proportion to the quantity of fluid in the tank.

T he invention may be carried out in more than one specific manner, as herein set forth.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is an illustration of the invention showing the gage in elevation with a portion of the front plate broken away, the fluid tank in vertlcal central section, and the electrical connections diagrammatic. Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 1.

There is shown in Fig. 1 a gage caslng 10 having a removable front plate 11 angularly adjustable in said casing and secured in adjusted position by a set screw 14. In said plate 11 there is-a curved slot 13 ad acent which there are graduation marks and numerals indicating the contents of the tank. The angular adjustment referred to is to enable said graduations suit varying conditions of the remainder of the device and so that said graduations will correctly indicate the contents of the tank.

'Within the casing 10 there is a pair of coils 18 and 19 secured to the back wall of the casing and having the same axis. The

'trally and vertically to be adjusted to i .at the bottom and the axes of the two coils are approximately at 90 degree angles to each other. A needle bar 15 is centrally fulcrumed on a rod 16 mounted in the center of said coils so that the similar poles of said two coils will correspondingly influence said needle according to the curve and magnetic influence. in each of said coils. A pointer 17 of the needle approaches to and moves along the groove 13 in order to indicate the fluid contents of the tank. The coils 18 and 19 are in a divided circuit so that when current is passed through them there will be a resultant north and south pole line substantially in the direction of the needle valve 15. The direction of this north and south pole line will depend upon the strength of the current passing through each coil and the needle will take a position in line with such north and south pole line.

The fluid tank 20 has mounted in it cena rod 21 of some nonconducting material. This rod extends from the top to or nearly to the bottom of the tank and there are coiled about said rod two wires 22 and 23 in the same direction and parallel with each other from the top to the bottom, but kept electrically out of contact at all points. There'is in said tank also a float 25 through the center of which said rod 21 extends and at the central opening 26 thereof there is mounted spring brushes 2 in electrical connection with each other and adapted to yieldingly engage the wires surrounding the rod 21 so as to engage said wires and thus close the circuit between said Wires.

The wiring is as follows: A wire 30 extends from a battery 31' and is connected with a wire 32 which isconnected with the upper ends of the two coils 18 and 19. In this way the current from the battery is divided to the two coils. A wire 33 runs from the battery to wire 23 and has in it a switch 84. The wire 23 runs to the lower end of the coil 19 and has in it a resistance coil 35. The wire 22 runs to the lower end of the coil 18.

The operation of the device is as follows: If the tank 20be empty, the float 25 will be brushes 27 at the lower end of what may beelectrically considered as the resistance coil in the tank, that is, the two wires 22 and 23 coiled about the rod 21. When the switch 3A 1s closed,

the circuit is closed set up in the coils balanced because the tank and the resistance coil in, the tank are unbalanced. .That is, as here shown, the resistance coil in the tank is greater than the resistance coil 35 out of the tank. Therefore, the magnetic/influence of the coil 19 which is connected with the resistance: coil 35 will be greater than that of coil 18. Consequently the needle bar 15 will be correspondingly' influenced and the pointer 17" moved to the right to its limit and indicate the empty'mark on the-gage. If, however, theta-11k 20, say, is one haIffull, then the re sistance of" the resistance coil within the tank is considerably reduced and substan tial'l'y equalsthe resistance of coil 35 out of the tank and-this causes the magnetic influ-- enceof coils 1'8 and 19 to beequal, thus making the mutual north and south axes so that and a magnetic influence 18 and 19, which are unthe'resistance 35 out of the pointer 17 will indicate that the tank ing an electrically t the top substantially to the bottom of the.

20" is half full. If the tank be full and thefloat is at the top, there will be no resistance in the tank to the coil 19 and the pointer will be moved to its limit at the left and indicate that the tank is full.

The invention claimed is: V

1. A device of the kind described including an electrically operated gage, a liquid tank, an electrical circuit for operating-said gage, anda float within the tank adapted to directly bridge and close said circuit and vary the resistance according to the quantityof fluid in the tank.

2. A device ofthe kind described incl'ud ing an electrically operated gage, a liquid? tank, anelectrical circuit for operating said gage,.said circuit having a vertical resist ance in the tank adaptedto. extend'int'o the fluid therein and including-a pair of paral lel' wires electrically disconnected and means actuated by the level of said fluid forvarying the resistance.

3; A device of the kind described includ ing; an, electrically operated gage, said circult having. a vertically disposed resistance coil'in the tank consistingof a pair ofparaL. lelf wires electrically disconnected, and a. float in said tank carryingbrushes adapted to. engage said resistance coil as the float rises and lowers and. close the. circuit be tween said wires at variable distances from the end of the coil.

4. A device of-the' kind. described includ operated gage, a .liquid. ank, 'a non-conducting rod extendin from tank,. and

I an electrical circuit extending from said gage into said tank with the two.

opposethe resistance of the coil 35'. Therefore, the magnetic influ ence of the coil 18 will greatly exceed that of of the tank and wires thereof in said tank parallel with each other and Wound about said rod from top to bottom: and at all points disconnected 'from each other;

5. A device of the kind described includ ing an electrically operated gage, a liquid tank, a non-conducting rod extending from the top substantially to the bottom of the tank, an electrical circuit extending from said gage into said tank with the two wires thereof in said tank parallel with each other and wound about said rod from top to bottom and at all points disconnected from each other, a float'in said tank, and electrically connected spring brushes carried by said float in position to engage said wires.

thereoi insaid: tank parallel with each other and wound: about saidrod from topv to bottom and at all points disconnected: from each: other, a float in said tank surrounding said rod and wires, and electrically con nected' spring brushes: carried by said float in position to engage said wires as the float moves upor down.

7. A device of the kind described including an electrically operated, gage, a liquid tank, an electric circuit for operating said gage having" in it a resistance coil outside aresistance coil inside of the tank, and afloat in said tank engaging the resistance coil therein for bridging the circuit and Varying the resistance thereof according to the quantity of fluid in the tank.

81 A device of thekind described including an electrically operated gage, a

liquid tank, and anelectrical circuit foreperating said gage and having in it a resistance coil*'outside of the tank, and a resistance coil inside of'the tank adapted to be varied accordi'ng tothe quantity of fluidtherein, the resistance coil out as half of the resistance coil in thetank so that they will substantially equal each other when the tank is about half full of fluid.

In witness whereof, we have hereunto afli'xed 'our signatures'in the presence of thewi'tnesses herein named.

FRANK IL. REMY. BENJAMIN P. REMY- ARTHUR: BERGER.

Witnesses: I

FRANK W. Mammon, RUTH I. Minnie.

of said tankhaving substantially the same resistance- 

